the transformation of data from a recognizable format to a form unrecognizable
without the algorithm used for the transformation.
ETL refers to the process of getting data out of one data store (extract),
modifying it (transfer), and inserting it into a different data store (load).
ETL is sometimes referred as ETT- Extraction, Transformation and Transportation.
It is a series of batch interface between the systems.
Tools programmed to provide canned reports or briefing books to top-level
executives. They offer strong reporting and drill-down capabilities. Today these
tools allow ad-hoc querying against a multi-dimensional database, and most offer
analytical applications along functional lines such as sales or financial
analysis. (Also known as Decision Support System.)
The ability to easily add new functionality to existing services without major
software rewrites or without redefining the basic architecture.
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